ADVISORY BOARD ON RADIATION AND WORKER HEALTH

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4676 Columbia Parkway, MS: C-46
Cincinnati, Ohio 45226
(513) 533-6825

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October 11, 2006

The Honorable Michael O. Leavitt
Te PhD. Secretary of Health and Human Services
Lafayette, Indiana Department of Health and Human Services
200 Independence Avenue, S.W.
Washington, DC 20201

MEMBERS:

Bradley i Clawson Dear Mr. Secretary:

Michael H. Gibson The Advisory Board on Radiation and Worker Health (The Board) has
Franklin, Ohio evaluated SEC Petition-00060 concerning workers at the S-50 Oak Ridge

Mark A. Griffon Thermal Diffusion Plant under the statutory requirements established by
Solemn, New Hampehire EEOICPA and incorporated into 42 CFR Sec. 83.13.and 42 CFR Sec.

James E. Lockey, M.D. 83.14. The Board respectfully recommends a Special Exposure Cohort
Eineinnatts Ofte: (SEC) be accorded to all employees of the DOE predecessor agencies,

James M. Melius, M.D., Ph.D. and their contractors or subcontractors, who were monitored or should
Mhany; New York have been monitored while working at the S-50 Oak Ridge Thermal

Wanda I. Munn Diffusion Plant for a number of work days aggregating at least 250 work
Richland, Washington days during the period from July 9, 1944 through December 31, 1951, or

John W. Poston, Sr., Ph.D. in combination with work days within the parameters established for one or

Corioge:Setion, Texas more other classes of employees in the SEC.

Robert W. Presley
(Clinton, Tennessee This recommendation is based on the following factors:
Genevieve S. Roessler, Ph.D.
Elysian, Minnesota e People working in S-50 Oak Ridge Thermal Diffusion Plant were
employed in a wartime uranium enrichment facility from July 9, 1944

to September 9, 1945 and in feasibility studies for the Nuclear Energy

STAFF for the Propulsion of Aircraft project from May 1, 1946 through
EXECUTIVE SECRETARY: December 31, 1951. NIOSH found that it lacked access to internal and
Lewis V. Wade, Ph.D external personnel dosimetry data and other workplace monitoring
Weshington, BC. data necessary to reconstruct internal and external exposures to
uranium compounds and other radioactive materials that may have
COMMITTEE MANAGEMENT : been present at the facility during the time period in question and thus
LaShawn D. Shields was unable to estimate, with sufficient accuracy, radiation doses from
‘Banta, Georgia internal and external exposures for these workers. The Board concurs

with this determination.


The Honorable Michael O. Leavitt October 11, 2006

e NIOSH determined that health was endangered for the workers exposed to radiation in S-
50 Oak Ridge Thermal Diffusion Plant during the time period in question. The Board
concurs with this determination.

e The NIOSH review of the data was found that it was sufficient to support accurate
individual dose reconstruction for occupational medical doses for workers at the S-50 Oak
Ridge Thermal Diffusion Plant during the time period in question. The Board concurs with
this determination

Enclosed is supporting documentation from the recent Advisory Board Meeting held in Las
Vegas, Nevada where this special exposure cohort was discussed. If any of these items are
unavailable at this time, they will follow shortly.

Sincerely,

Paul L. Ziemer, Ph.D.
Chairman

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